“…The spatial domain algorithms mainly include principal component analysis [4,5], guided filtering based method [6] and so on. The transform domain algorithms are mainly based on multiresolution geometric analysis (MGA) tool domain, such as image fusion algorithm based on wavelet [7,8], ripplet [9], contourlet [10][11][12], shearlet [13,14], surfacelet [15], trained dictionaries [16,17].…”